V-thread pattern induces least von Mises stress, contact pressure and displacement compared with other thread patterns like square, buttress and revers buttress thread
under vertical occlusal loading condition.
Threading macros--42 pages of them and variables for threading, in particular for buttress threads
. With their asymmetrical cross-section, buttress threads
are best to withstand the shock loads, vibration, and high stresses in rock crushers.
There's no worry about someone tearing out the page about buttress threads
for "reference." Also, searchability in the digital version is easier, compared to the original handbook's indented chapter marks and tables of contents.
In addition, the higher application torques of modified buttress threads
provides resistance to loosening and product leakage.
Fittings can be installed by one person, yet they are of extremely heavy design and include heavy-duty buttress threads
so that the fitting may be tightened sufficiently to help prevent leaks under pressure.
The CHD cylinder has buttress threads
for bores over 3.5 in., with a variety of seal packages available.